Revenues When a Firm Engages in Peak-Load Pricing Based on the Above

Revenues when a firm engages in peak-load pricing based on the above graph will be

A) (P₁ x Q₁) + (P₄ x Q₃) .
B) (P₃ x Q₁) + (P₂ x Q₃) .
C) (P₁ x Q₂) + (P₂ x Q₃) .
D) (P₄ x Q₃) .